Piston slide valve



. A N mi M w U Wwww? K BUBLA PISTON SLIDE VALVE Filed oct. 11. 192s,...-wmwww 40 and lu ricating liquid.

'Patenti'.hl Dec. 20, 1.927.

mi. BUBLA, or rms EN, czEcHosLovmaf rrs'roN SLIDE VALVE.

- Application ileii October 11, 1926, Serial No..140,983 and inCzechoslovakia J'une 20, 1924.

. My Ainvention refers to valves end more especially to a piston slidevalve which 1s adaptedfor'use` in connectionwith apparatus for theimpregnation of lumber and 6 wood inQ general. It is an object of my 1n--vention to provide a valve of the kind described Which is capable 'ofresisting the corrosive action of the substances li'sed for.impregnation and which insures a permanently 10 reliable sealing of the,conduits serving for the passage of4 the impregnating solution.A

The impregnation of'wood is frequently effectedvwith the aid ofsolutions of mercurio chloride, copper sulfate or the like which. exerta v i orous corrosive action'on metals@ i and there ore render itimpossible to use metal valves in connection with the conduits throughwhich these solutions pass.g

The valve according to the present invention is capable o withstandingall these,corrosive actions by being made partly at least of concretewhich is not attacked by the chemi-A cals in question, the abrasion`occurrin between two concrete'members when slidinge upon each otherbeing provided for by linin one of the cooperating members of the va ve"and preferablythe valve box with a suitable material', such vas glass,and covering the 4other member with leather or'the like, glycerine orthe like being used for lubricat nigxfhe part's. A.

' the drawings'aixed to this epeciiica-L tion forming part thereof twomodificationsof'a valve embodyin inyentio are Si illustrateddiagrammaticaly 1n axial sect n by way of example, .10 Fig. 1` being avertical section of my valve showingA ohegiorm of structure andillustratin the method of utilizing the sealingl i. lve-'seat e employedmy valve struc- Fig..2 being a verticalsection of a ed orm of the-valv'e'head and va which may b ture.

a Referring ama Figi of am drawings )36 is the valve box or casing'nd 42is.tl1'e' valve iston. The 'passages 39 and 40 in the',l valve ox arelined-"with an'A as halt coating n 38.-, On-thetvlv'e seat'is' place anannular '50t 'rubber packingY il'lpl'iesentingl a bevelled outer edge. j43 is a coverflate mountedfon top of the valve vboi: 36' an fixed inplaceby, se ew bolts 45. Throu plate l thisI cover extends an internallythreaded Sleeve or nut 44 serving 'for raising and lowering the screwspindle carrying the piston.

.The inner surface .of the cylindricaltpart ofthe valve box, in whichthe valve proper is movably arranged, .is lined with glass reinforcedby. wire netting. The valve piston moving within this glass cylinder 46is formed of a c lindrical piece 42 of lreinforced concrete, t 1e bottomportion of which v Ais conical in order to keep the surface of the valveseat as small as possible. This concrete body is mounted on the bottompart of the valve spindle 5() and of screw bolts 49 serving to mountthereon the other parts of the valve so as to ensure a tight seal. Ontop of the, valve body proper 42 is placed a cup-shaped leather packing51 covering the upper edge and uper part of the outer wall of thebody42. 2 isa fibre body moving in close contact wit the glass cylinder46; another fibre cylinder 53 is covered on' both the upper and lowersurfaces with leather packings 54 and has an annular groove 55 providedin `its .circumferential part, which is illedwith glycerine or 'the likeserving for lubricating the leather packings. Two conduits 56,.57.;connect the groove 55 with' v the space above the piston, one ofthese conduits servingufor suppl ing thegroove withglycerine, w 1e theot er serves for allowing the escape of air. On top of theleather packincovering the bod -53 is mounted a third bre cylinder 58,' t e bottom'portion of which is also covered with a-leatherpack ing 59, while'onits'upper surface restthe nuts ofthe screw bolts 49 and a leather ring-60, a washer 61 and a nut62serving for pressing the veral vpartstogether. A glycerine'fla'yer 6 covers the iston and serves as a. urtherpacking an' for lubricating the l ther insertions.. In orderto`facilitate e operation of the valve, ball beary ings '48ersprovidedbetweenthe cover/ late 43 and' the threaded, sleeve- 4A Aandandl wheel 44',

In'the modified valve disclosed injFig. 2 the bottom. part 101 consistsof ametal block onto whichis arranged a layeijfl'lOO of rubber fixed.`by vu1canization,f`inwardly directed dan s 102 extending into-annularooves .I of t e metal block Qand` dove-tailedl r1bs103 -lo!! formed onthe"rubber and' extending' into u similar' grooves of the metal blockservi-ng for; preventingthe rubber cover from being torn oii'. A bottomlir cr 104 of a'llarder rubber product is fixed y vulcaniz'ation andthis layer is again protected by a bottom layer 105 of soft rubberresting on the concrete seat 106. The valve spindle and screw bolts 107are preferably covered with vulcanized rubber layers.

I Wish it to be understood that I do not desire to be limited to theexact details of construction shown and described, for obviousmodifications will occur to a person skilled in the art.

1. Piston slide valve comprising a concrete valve box with a cylindricalguide surface and a piston slidably mounted therein, said pistoncomprising a block adapted to cooperate with a seat in said box, a fibredisc on said block, a spindle for handling said piston and a packinginserted between said block and said disc and said guide surface,respectively.

2. Piston slide valve comprising a concrete valve box with :1cylindrical guide surface and a piston slidably mounted therein, saidlpiston comprising a block adapted to cooperate with a'seat in said box,a fibre disc on said block, a spindle' for handling said piston, apacking inserted between said respectively,

block and said disc and said guide surface and a sealing liquid on topvof said disc.

3. Piston slide valve comprising a concrete valve box with a cylindricalguide sur face and a piston slidably mounted therein, said pistoncomprising a block adapted to cooperate with a seat n said box, agrooved bre'disc on said block, a spindle for handling'vsaid piston, apacking inserted betweemsaid block and said disc and said gulde 4surfacerespectively, and a sealing liquid on top and in the groove of saiddisc.

4. Piston slide valve "comprising a concrete Valve box with acylindrical guide surface and a piston slidably mounted therein, saldpiston comprising a block adapted to cooperate with a seat in said box,a grooved vfibre disc on said block, a spindle for handling said piston,a packing inserted between said block and said disc and said guidesurface, respectively, communication between the top and the groove ofsaid disc and a sealing liquid on top and in the groove of said disc. tIn testimony whereof, I aix my signaure.

KARL BU'BLA.V

